ELECTRICAL DEVICE WITH A HOUSING HOLDING INSULATION OIL AND A SENSOR AND METHOD OF MONITORING THE DEVICE
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United States of America Patent
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Issued Date -
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app pub date -
Aug 21, 2015
filing date -
Sep 18, 2014
priority date (Note) -
Published
status (Latency Note)
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Abstract
An electrical device (10, 13), in particular a power transformer (13), a shunt reactor, or an on-load tap changer (10), comprises
- a housing (101, 131) that is filled or fillable with insulation oil (11, 11′); anda sensor (12) that comprisesa piezo element (16) in the housing (101, 131) on a level with a minimum fill level (19, 19′) of the insulation oil (11, 11′); andan evaluation device (18) that is connected to the piezo element (16);whereinthe evaluation device (18) is formed such thatit can induce an oscillation of the piezo element (16);andit can determine the fill level from a measurement of a characteristic of the oscillation, in particular the half-life period of the amplitude of the oscillation.
First Claim
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